<template>
	<div class="list" ref="wrapper">
		<div>
			<div class="area">
				<div class="title border-topbottom">当前城市</div>
				<div class="botton-list">
					<div class="botton-wrapper">
						<div class="botton">{{this.currentCity}}</div>
				 	</div>
				</div>
			</div>
			<div class="area">
				<div class="title border-topbottom">热门城市</div>
				<div class="botton-list">
					<div class="botton-wrapper" v-for="item of hot"
					:key="item.id"
					@click="handleCityClick(item.name)">
						<div class="botton">{{item.name}}</div>
				 	</div>
				</div>
			</div>
			<div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
				<div class="title border-topbottom">{{key}}</div>
				<div class="item-list">
					<div class="item border-bottom"
					v-for="innerItem of item"
					:key="innerItem.id"
					@click="handleCityClick(innerItem.name)">{{innerItem.name}}</div>
				</div>
			</div>
		</div>
	</div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
	name: 'CityList',
	props: {
		hot: Array,
		cities: Object,
		letter: String
	},
	computed: {
		...mapState({
			currentCity: 'city'
		})
	},
	methods : {
		handleCityClick (city) {
			this.changeCity(city)
			this.$router.push('/')
		},
		...mapMutations(['changeCity'])
	},
	watch: {
		letter () {
			if (this.letter) {
				const element = this.$refs[this.letter][0]
				this.scroll.scrollToElement(element)
			}
		}
	},
	mounted () {
		this.scroll = new Bscroll(this.$refs.wrapper)
	}
}	
</script>

<style lang="stylus" scoped>
	@import '~styles/varibles.styl'
	.border-topbottom
	  &:before
	    border-color: #ccc
	  &:after
	    border-color: #ccc
	.border-bottom
	  &:before
	    border-color: #ccc
	.list
		overflow:hidden
		position:absolute
		top: 1.58rem
		left: 0
		right: 0
		bottom: 0
		.title
		  line-height: .54rem
		  background: #eee
		  padding-left: .2rem
		  color: #666
		  font-size: .26rem
		.botton-list
		  overflow: hidden
		  padding: .1rem .6rem .1rem .1rem
		  .botton-wrapper
		    float: left
		    width: 33.33%
		    .botton
		      margin: .1rem
		      padding: .1rem 0
		      text-align: center
		      border: .02rem solid #ccc
		      border-radius: .06rem
		.item-list
		  .item
		    line-height: .76rem
		    padding-left: .2rem
</style>